Clutch.



r'. l. FASSETT.

CLUTCH. AAAAAAAAAAAAAAAAAAAAAAAAAA 0.

1,118,518.` Patented N0v.24,1914

l ai:

UNITED STATES PTENT oEEIcE.

FRANCIS K. FASSETT, OF DAYTON, OHIO, ASSIGNOR TO MAX H. FISCHER, OF A NEW YORK, N. Y.

CLUTCH.

Specification of Letters Patent.

Patented N ov. 24, 1914.

To all whom t may concern Be it known that I, FRANCIS lK. FAssETT, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented a new and useful Improvement in Clutches, of which the following is a specification. i

The object of my invention is to produce a clutch, which when placed on a rod, may

,\ be easily moved thereon in either direction;

that will grip the rod and become immovable in onedirection when pressure is applied to a certain part of the clutch, but which, when the pressure is removed from that certain part, is movable in either direction, as before, without any special act being necessary for its release. One of the uses for such a clutch is to prevent a scarf pin being lost or stolen, and this specification and accompanying drawings will be confined to the form best ada ted to this use. Among the scarf pin hol ers now on the market, there are some suiliciently convenient,'so far as placing them on the in is concerned, but in all that I know o a certain part, usually small and not easy of access With'the holder in position, must be manipulated before Yit can be removed. In my holder this objection is entirely removed, all the parts being confined in a .cylindrical casing by which itis handled, either in putting it.on or in removing it from a pin.

In the accompanying drawings,-Figure 1 is a .longitudinal section; Fig. 2 a similar section, with'a pin in place; Fig. 3 a transverse section.

Similar letters and numerals refer to similar parts throughout.

Referring to the drawings, the casing 'A is secured to the large end of the conical frustum B, the other end of the casing having an opening a acting as guide -for the small end of an operating member C., The large end of member C is guided by the interior of casing A. The member C has a longitudinal bore c opening into a conical recess c1, which incloses, to a variable extent, the frustum B. The latter has a bore b, in alinement with bore c, and also one or more transverse holes b1, communicating therewith. A ball or roller, ball, is coniined in each hole. slight contraction of holes b1 at their junctions with the bore, prevents the balls falling into the bore, although permitting a large portion preferably a of each ball to protrude into it. A spring I), confined between the end of the casing and the shoulder formed by the enlargement of the member C, tends to press the member C toward the frustum B, thereby causing the converging sides of the recess c1 to engage and press the balls toward the bore b. A pin inserted through the bore o into b, thrusts the balls obstructing its passage, aside, and the resultantpressure of the balls against the inclined sides of recess c, supplemented b such rotary movement as may be imparte to them by the passage of the pm, overcomes the resistance of the spring D and moves the member C outwardly.

Thetstrength of the spring is made such that while it creates enough friction between `the balls and pin to revent the holder accidentally slipping o of the pin, the friction is not so great as to prevent 1t being moved in either direction on the pin, provided `it is handled by the casing.

Before a pin is inserted, the end of the member C is preferably about Hush with the end of the casing, but when a pin is in the holder, this end will protrude beyond the casing more or less, according to the diameter of the pin. But even with the largest pin receivable, its protrusion need be but a short distance, compared to'the length of the casing. The pin cannot be withdrawn from the holder if resistance is brought to bear against this protruding end, as the balls, being pressed between the pin and sides of the recess, will rotate and roll into the reduced portion of the recess, thereby causing them to grip the pin tightly and prevent its withdrawal. It would perhaps be more correct to say the balls tend to ro tate, as their movement is in fact little more than a tendency, although sulicient to cause them to grip the pin as stated. `When an attempt is made to pull a pin protected by one o my holders, out of the tie, the protruding member, being forced against the fabric of the tie, actuates the balls as above described. As soon however as the pressure is removed from the member C, the several parts of the holder resume their normal positions, z'. e., those occupied before the balls had been made to grip the pin. This is evidenced by the fact that the pin and holder may be separated aseasily after the balls have been made to grip the pin as be fore, if the holder is handled by its casing.

My clutch may be used for other 'purposes than that of protecting a scarf pin, without departing from the principles or essential parts of the construction described.

ll therefore claim:

l. lin a clutch, the combination of a tubu lar casing, contracted at one end, a closure Xed in the other -end thereof, having an inward tree standing extension with a longitudinal bore and one or more transverse holes communicating therewith, a gripping device, conned in each hole, a member within the casing and movable longitudinally therein, having a bore in alinement with that of the closure and a recessed end adapted to inclose the free standing exten- Vsion,the walls of the recess being oblique and adapted to engage and move the gripping devices, and a spring surrounding the said movable member and confined between a shoulder termed thereon and the contracted end of the casing. l v

2.1i scart pin guard, comprising a body having an insertion opening, and provided at the end oli the body opposite the insertion end with an inclined wall daring outwardly maar@ and with a shoulder extending outwardly from said body, a head having a central aperture to receive a scarf pin and with lateral apertures, friction balls arranged within. said lateral apertures and adapted to extend into the central aperture of said head and to bear against said inclined wall of said body, a coiled spring encircling said body and bearing against said shoulder, and a sleeve overlapping and inclosing said vspring and provided with a shoulder connected with said head.

3. A scarf pin guard, comprising a body- 

